updated changelog

Author: stefanosiano

CHANGELOG.md

@@ -8,6 +8,10 @@
     - Use `Sentry.replay().enableDebugMaskingOverlay()` to overlay the screen with the Session Replay masks.
     - The masks will be invalidated at most once per `frameRate` (default 1 fps).
 
+### Fixes
+
+- Send UI Profiling app start chunk when it finishes ([#4423](https://github.com/getsentry/sentry-java/pull/4423))
+
 ## 8.12.0
 
 ### Features